22 years is remarkable for a water heater! I believe I read the average life span of home mechanicals is between 10-15 years. There's a lot to gain from replacing a tank that doesn't appear to need it. For starters, as has been said, the heating technology has advanced considerably in the past 5-10 years. Current day heaters are incredibly energy efficient, and heat far faster than ones from even only 2-3 years ago. And of course, new "tankless" water heaters are amazingly energy efficient, provide endless supplies of hot water and often carry lifetime (yes LIFETIME) warranties against leaking. In addition, I don't know about Canada, but there are some programs in the states (both at a federal and state level) which encourage the replacement of older appliances with new energy-efficient ones through tax rebates or discounts. Could you wait until it fails? Most likely. I don't often hear of a water heater failing by leaking. Seems they fail mostly by simply not heating water anymore. But, if they were to leak, you would likely see signs of it before it became disastrous. Most leaks, from what I've read, start at either the drain valve or the pressure relief valve. And usually it's a drip. So if you see any dripping at either of those spots, definitely get it checked out before it becomes a bigger problem.What kind of fuel is it anyway? Gas? Oil? Electric? But the other advantage to replacing it before a failure is you can shop around, get the best deal, and find the most inexpensive installer. If your heater craps out on you though (beyond repair), you'll surely need to get it replaced quickly, and you will not likely have the luxury of finding the best brand, at the best price, installed for the lowest cost.Just my (canadian of course! )EDIT:Did some googling, hopefully this will also help you:Quote, originally posted by The Dollar Stretcher »ear NH,How do I know when it's time to replace my water heater? I built the house in the spring of 1985 and I still have the original water heater. This water heater has never been drained. Shortly after it was installed the pressure valve leaked and was replaced, and I have been the only person living in the house up until Sept. 1997 when my mother moved in with me.For about three months I have noticed that the pressure valve has been leaking a little water, so when my brother came up for the holidays, I asked him to change it. Both the pressure valve and the galvanized metal nipple showed a considerable amount of junk in them. I replaced both. The only noise I have ever heard from the water heater is a rumbling when a faucet is turned on while the water heater is heating water.BO in the Mojave Desert, CABO,There is no tried and true way to know precisely when a water heater needs replacement. Obviously, a leak in the body of the heater requires immediate replacement. If there is a major malfunction, such as complete or partial loss of hot water supply, leakage around plumbing fittings, or the appearance of excessive corrosion on the heater body itself or at the heater's plumbing connections, AND the unit is more than eight years old, replacement may be preferable to repair (if a repair is possible, that is). I would leave this up to your budget and repair skills.All the active parts and most of the plumbing parts--the heating elements, thermostat, anode rod, and the various valves--are designed to be replaceable. The main obstacle to disassembly is corrosion. A water heater corrodes more quickly than other plumbing fixtures because of the constant high temperature at which it operates, and the fact that sometimes the water heater acts as an electric ground, accelerating this corrosive process. Corrosion makes replacing any parts chancy, since the replacement may leak, necessitating the replacement of the entire heater. So, like a conscientious Boy Scout, be prepared for the possibility of replacement even when the repair seems simple and straightforward. So it goes with plumbing!In your specific case, with a water heater more than 13 years old, repairs are probably not cost-effective, since the life expectancy of a water heater is only 8-12 years. As they age, they become less efficient. This is true for all heaters, but more for electric types. Modern water heaters have better insulation and are more efficient "out of the box," so you may notice dramatic savings in fuel and/or electric costs by replacing it.NHSource:
http://www.stretcher.com/stories/990201m.cfmAnd a longer article on whether or not to replace:Replacing Water Heaters
http://www.servicemagic.com/ar....html
YES!I still visit GenVibe periodically. I have not forgotten about my "original" family over here!
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